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TDA5051AT 데이터시트(PDF) 4 Page - NXP Semiconductors

부품명 TDA5051AT
상세설명  Home automation modem
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA5051AT 데이터시트(HTML) 4 Page - NXP Semiconductors

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1999 May 31
4
Philips Semiconductors
Product specification
Home automation modem
TDA5051A
PINNING
SYMBOL
PIN
DESCRIPTION
DATAIN
1
digital data input (active LOW)
DATAOUT
2
digital data output (active LOW)
VDDD
3
digital supply voltage
CLKOUT
4
clock output
DGND
5
digital ground
SCANTEST
6
test input (LOW in application)
OSC1
7
oscillator input
OSC2
8
oscillator output
APGND
9
analog ground for power amplifier
TXOUT
10
analog signal output
VDDAP
11
analog supply voltage for power
amplifier
AGND
12
analog ground
VDDA
13
analog supply voltage
RXIN
14
analog signal input
PD
15
power-down input (active HIGH)
TEST1
16
test input (HIGH in application)
Fig.2 Pin configuration.
handbook, halfpage
TDA5051AT
MGK833
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DATAIN
DATAOUT
VDDD
CLKOUT
DGND
SCANTEST
OSC1
OSC2
APGND
TXOUT
VDDAP
AGND
VDDA
RXIN
PD
TEST1
FUNCTIONAL DESCRIPTION
Both transmission and reception stages are controlled
either by the master clock of the microcontroller or by the
on-chip reference oscillator connected to a crystal. This
ensures the accuracy of the transmission carrier and the
exact trimming of the digital filter, thus making the
performance totally independent of application
disturbances such as component spread, temperature,
supply drift and so on.
The interface with the power network is made by means of
an LC network (see Fig.18). The device includes a power
output stage that feeds a 120 dB
µV (RMS) signal on a
typical 30
Ω load.
To reduce power consumption, the IC is disabled by a
power-down input (pin PD): in this mode, the on-chip
oscillator remains active and the clock continues to be
supplied at pin CLKOUT. For low-power operation in
reception mode, this pin can be dynamically controlled by
the microcontroller, see Section “Power-down mode”.
When the circuit is connected to an external clock
generator (see Fig.6), the clock signal must be applied at
pin OSC1 (pin 7); OSC2 (pin 8) must be left open-circuit.
Fig.7 shows the use of the on-chip clock circuit.
All logic inputs and outputs are compatible with
TTL/CMOS levels, providing an easy connection to a
standard microcontroller I/O port.
The digital part of the IC is fully scan-testable. Two digital
inputs, SCANTEST and TEST1, are used for production
test: these pins must be left open-circuit in functional mode
(correct levels are internally defined by pull-up or
pull-down resistors).
Transmission mode
To provide strict stability with respect to environmental
conditions, the carrier frequency is generated by scanning
the ROM memory under the control of the microcontroller
clock or the reference frequency provided by the on-chip
oscillator. High frequency clocking rejects the aliasing
components to such an extent that they are filtered by the
coupling LC network and do not cause any significant
disturbance. The data modulation is applied through
pin DATAIN and smoothly applied by specific digital circuits
to the carrier (shaping). Harmonic components are limited
in this process, thus avoiding unacceptable disturbance of
the transmission channel (according to CISPR16 and
EN50065-1 recommendations). A
−55 dB Total Harmonic
Distortion (TDH) is reached when the typical LC coupling
network (or an equivalent filter) is used.


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